Time-fuse.



' Patentd May 20, i902.

o. HARTMANN.

T M E F u s E. (Applica-ion med my 15, 1900A) No Model.)

wifi/leona IUNr'rnn STATES PATENT Gaston.

'ro FRIED. KRUPP, oF

ESSEN, GERMANY'.

TIME- FUSE.`

SPECIFICATION forming part of Letters Patent-. No. 700,643, dated May 20, 1902. Application filed May l5, 1900. y Serial-No.16,722. (No model.)

To all whom, it may concern.:

Be it known that I, OSCAR HARTMANN, engineer, a citizen of the German Empire, vresiding at 1l Bahnhofstrasse, Essen-on-the- 5 Ruhr, Germany, have invented certain new and useful Improvements in Time-Fuses, of which the following is a specification.

Figure 1 shows the fuse before the projectile is 1'ired,and Fig. 2 shows the effect upon the Io fuse resulting from firing the projectile.

My invention has reference to improvements in time-f uses of the class provided with a ringcontaining mealed-powder composition and readily adjusted by hand without the use I5 of a key or other tool; and it has for its object to prevent this adjustable powder-ring from being accidentally turned by vthe sudden rotation of the shell on firing and consequent premature ignition of the bursting charge in 2o the shell. I

With this object in view my invention consists,essentia1ly, in the combination, in a timef se of the character set forth, of a spindle and a powder-ring adapted to turn freely about said spindle, and said spindle having its sectional area at the portion adjacent to or in contact with the powder-ring reduced suiciently to insure lateral expansion or upsettingof the spindle against the' powder-ring 3o by the inertia of the several parts on firing, whereby the powder-ring is automatically jammed against rotation at the moment of firing. j

' The nature of my invention will best be understood when described in connection with the accompanying drawings,'which represent a vertical cross-section of a time-fuse embodying my invention.

Referring to the drawings, wherein I have 4o shown a timefuse vprovided with a lixed and .movable powder-ring, the letter A designates the spindle or body of the fuse, which is made in one piece with the time-disk B and.

which, as usual, carries Within its vouter hollow portion I aplunger C and a firing-pin D. On the spindle A are mounted two powderrings E and F, of which the ring E is prevented from being` turned about the spindle by a key G and a suitable seat, while the lat- 5o ter ring, F, is mounted to turn suciently free on said spindle to permit a readyadj usttional area at the portion adjacent to the powment by hand without the necessity of employing a key or other tool for this purpose. r[The inner part of the spindle A-that is to say, the part adjacent to or in contact with the movable powder-ring F and forminga journal-for the same-is bored or hollowed out for the purpose of reducing its sectional area at said portion suiiiciently to insure upsettingr or expansion of the spindle at this 6o portion against the powder-ring by the inertia of the various parts on firing. The outer end of the spindle is externally threaded to receive a threaded cap H, provided at its inner end with a thin circumferential rest or bearing K, engaging the outer ring E and adapted to yield under pressure.

After the fuse has been timed by properly turning the powder-ring F the shellis placed into thel breech of the gun. At the moment of firing a small retardation'of the cap H and the upper thicker part of the spindle I takes place in view of the inertia of the said two parts, while by the impact and in view of the simultaneous spreading of the ledgev K the' lower or thinner part of the spindle A is upset or expanded at that portion adjacent to or in contact with the movable part of the powder-ring F. By virtue of this upsetting or expansion of the spindle the powder-ring F is locked orl jammed against turning on the commencementof the rotation of the shell.

The time-f use herein shown operates in the usual manner, and with the exception of the means for jamming the movable powder-ring is of a usual well-known construction. It is evident that the novel construction herein described may be embodied in time-fuses of other construction Without departing from the spirit of my invention.

What I claim as new is- 1. In atme-fuse, the combination of a spindle and a powder-ring mounted to turn about said spindle, and said spindle having its secder-ring reduced suflciently to insure lateral upsetting of said reduced portion against the' powder-ring by the inertia of the several parts on firing; whereby the powder-ring is jammed and prevented from turning, substantially as described.

2. In a ti me-f use of the character specified,

the combination of a spindle, a cap aixed't'o the outer end of the spindle and provided with l a yielding bearin g engaging the adjacent part of the fuse, and a powder-ring mounted to turn about said spindle, and said spindle having its sectional area at the portion. adjacent to the powder-ring reduced suiciently to insure upsetting of the spindle at said reduced portion by the inertia. of the several parts on firing; whereby the powder-ring is jammed and prevented from turning, substantially as described.

3. In a time-f use of the character specified, the combination of a spindle, a cap affixed to the outer end of the spindle and provided with a thin, circumferential rest or bearing engaging the outer fixed powder-ring, and an inner poWfier-riugr adapted to turn about said spindle, and said spindle having its sectional area at the portion adjacent to the inner powder ring reduced suficiently to insure upsetting of ihe spindle at said reduced portion by the inertia of the several parts on firing; whereby the inner powder-ringis jammed and prevented from turning, substantially as described.

4. In a time-fuse, the combination of a spindie and a powder-ring mounted to turn about said spindle, and said spindle being hollowed out to reduce the sectional area atv the portion thereof in contact with the powder-ring suiiiciently to insure lateral upsetting of said reduced portion against the powder-ring by the inertia of the several parts on firing; whereby the powder-ring is jammedand prevented from turning, substantially as described. Y I

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

OSCAR HARTMANN.

Witnesses: Y

WILLIAM ESSENWEIN, ERNEST ANDRE. 

